METHOD FOR MANUFACTURING METALLIC VANADIUM - NAT UNIV CORP HOKKAIDO UNIV

Title:

METHOD FOR MANUFACTURING METALLIC VANADIUM

Document Type and Number:

WIPO Patent Application WO/2016/129009

Kind Code:

A1

Abstract:

[Problem] To provide a method by which high-purity metallic vanadium is manufactured inexpensively and energy efficiently. [Solution] Provided is a method for manufacturing metallic vanadium in which a portion of an inorganic molten salt for forming a molten salt electrolytic bath in a reaction vessel is electrolyzed to generate calcium, and a vanadium compound is thermally reduced by the calcium to manufacture metallic vanadium, wherein at least one of the following conditions is met in the method for manufacturing metallic vanadium: the portion of the inorganic molten salt contains one or more compounds selected from the group consisting of sulfides and sulfate compounds of calcium; and the vanadium compound is a mixed vanadium compound containing one or more compounds selected from the group consisting of vanadium sulfide, vanadium sulfate compounds, vanadium thiosulfate compounds, ammonium metavanadate, and vanadyl sulfate.

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Inventors:

SUZUKI RYOSUKE (JP)
SATO KANJI (JP)
FURUKAWA HIDEKI (JP)

Application Number:

PCT/JP2015/000594

Publication Date:

August 18, 2016

Filing Date:

February 09, 2015

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Assignee:

NAT UNIV CORP HOKKAIDO UNIV (JP)
LE SYSTEM CO LTD (JP)

International Classes:

C22B34/22; C22B5/04; C25C3/02; C25C7/06

Foreign References:

CN102978664A	2013-03-20
JP2009287045A	2009-12-10
JP2004052037A	2004-02-19

Other References:

YUICHI OKA ET AL.: "Direct Reduction of Vanadium Oxide in the Molten Calcium Chloride", JOURNAL OF THE JAPAN INSTITUTE OF METALS, vol. 72, no. 3, 2008, pages 181 - 187
OKA YUICHI ET AL.: "Direct Reduction of Liquid V205 in Molten CaCl2", SYMPOSIUM ON MOLTEN SALT CHEMISTRY, vol. 40, 2008, pages 652 - 657

Attorney, Agent or Firm:

NISHIYAMA, Tadakatsu (JP)
Tadakatsu Nishiyama (JP)

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